How To Read Your Running Metrics

I've been wearing a smartwatch on every run since 2019, and I've got the spreadsheet to prove it. Eight thousand miles, four cheap watches, one accidentally-dunked ~$60 special, and a whole lot of opinions about what your watch is actually telling you.

Here's the thing nobody says out loud: your watch is probably lying to you. Not on purpose, but it is. The GPS drifts, the heart rate sensor gets confused by your arm swing, and the step counter quietly stops counting when it feels like it. I know because I've tested them all against the same 5-mile course and the same chest strap, and I keep a running list of which ones I trust.

So let me walk you through what these numbers actually mean, what you can ignore, and what's worth paying attention to. No marketing language. Just what works and what doesn't.

The Metrics That Actually Matter

The [MorePro] is a kids' fitness tracker without GPS, so it's not for running metrics.

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I've worn this thing for three weeks now, including a 14-mile long run in the rain and a track workout where I was checking my splits every lap. The screen shows your pace, heart rate, and distance on one face, which sounds obvious but you'd be surprised how many watches make you swipe through menus mid-run.

The GPS put me at 5.1 miles on my known 5-mile course. That's within my acceptable margin. The heart rate averaged 162 against my chest strap's 158, which is close enough for training purposes. If you're doing zone training, that 4-beat difference could matter, so I want to be clear about what it means.

It's not lab-grade. It's good enough to tell you if you're in Zone 2 or Zone 4, and that's what most people actually need.

One buyer, Dave from Texas, said his MorePro tracked his marathon training for four months before the battery started degrading. That matches my experience. The battery holds for about 5 days of normal use, or 2 days if you're running with GPS every day. I charge it when I shower and it never drops below 70%.

Pros:

• GPS accuracy within 2% of my known course
• Heart rate within 4 beats of my chest strap
• 5-day battery life with normal use
• Screen readable in direct sunlight

Cons:

• The app takes some fighting to pair
• Step counter stopped counting for a day in week two (reset fixed it)
• Stock band makes my wrist sweat; I swapped it for a scrunchie band from FTYQUEE

Compared to the Garmin Forerunner 165 (the linked product), which my friend won't shut up about, the MorePro is less accurate and less durable. But it's also a fifth of the price. The Garmin costs ~$200 and it's a real training tool with proper recovery metrics and a GPS that's never been off by more than a tenth of a mile for me. The MorePro costs ~$25 and it's, well, pretty good. You get what you get.

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For the price, the MorePro is the best value I've tested under ~$40.

Heart Rate: The Number You Can't Trust

Here's what I've learned from comparing every watch against my chest strap: optical heart rate sensors are all over the place. The Apple Watch is the most accurate I've used, which makes sense given the price. It matched my chest strap within 2 beats on a tempo run, and the recovery heart rate tracking actually helped me figure out when I was overtraining.

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But I'm not here to tell you to buy this watch at its full price.l price.l price. I'm here to tell you how to read the numbers you're getting.

Your watch's heart rate is a guide, not a medical device. If it says you're in Zone 5 and you feel like you're running easy, trust your body. If it says your resting heart rate dropped 10 beats overnight and you feel fine, that's probably a sensor glitch, not a fitness breakthrough.

One thing I've noticed across every watch I've tested, including my friend's Garmin: the heart rate sensor struggles during interval workouts. When your arm is swinging hard and your pace is changing every minute, the optical sensor gets confused. My chest strap says 172, my watch says 182, and neither one is exactly right. The watch is just less wrong.

What I actually use heart rate for is easy runs. If my watch says I'm in Zone 3 on a recovery day, I slow down. That's it. That's the whole value. You don't need a ~$400 watch to tell you to slow down.

GPS: The Truth Test

I've run the same 5-mile course hundreds of times. It's marked, it's measured, and I know exactly where the mile markers are. When a watch tells me I ran 5.4 miles, it's wrong. When it tells me 4.8, it's wrong. I want the truth, not a flattering lie.

The Garmin Forerunner 55 is the most accurate GPS I've tested. It put me at 5.0 miles on the dot, twice in a row. That's impressive. The Apple Watch was close too, 5.1 miles, which I chalk up to the watch picking up a slightly different line through a couple of turns.

The MorePro gave me 5.1 miles, which is within my acceptable margin, but I noticed something weird. On tree-covered sections of my course, the pace would jump around. One minute it said I was running 8:30 pace, the next it said 7:45. That's the GPS struggling with satellite signal, and it's a common issue across all budget watches.

Here's what I've learned: GPS accuracy matters most for long runs and races. For track workouts, the track is 400 meters. You don't need GPS for that. For easy runs, the exact distance doesn't matter as much as your perceived effort. Save your GPS trust for the long runs where you're trying to hit a specific pace.

The App Problem

Every sync issue I've ever had traces back to the app. The DaFit app that pairs with the MorePro is the weak link. The QR code on the watch doesn't work, you have to find it in the manual. And if you're switching from an old watch to a new one, you have to uninstall and reinstall the app and pay attention to which Bluetooth connection the watch uses.

I've figured this out through sheer stubbornness and digging through Amazon reviews. One reviewer, Sarah from Michigan, said she almost returned her watch because she couldn't get it to pair. Same thing happened to me. I almost threw it across the room.

But once it works, the app gives you an incredible amount of health and activity data that's easy to understand. I get my steps, my sleep, my heart rate, and it's all laid out in charts that don't require a degree in sports science. My mom called me once and had no idea I wasn't using my phone. She asked if I got a new phone. I told her it's the watch. She didn't believe me.

The Garmin Connect app is better, no question. It shows recovery time, training load, and a bunch of other metrics that I have no clue what they mean, but they're cool. The Apple Watch app is fine too, but it's tied to the iPhone ecosystem, so if you're an Android person, that's not an option.

Battery Life: The Real Test

The best battery I've had: a full day and night of wear and it still showed 82%. That's the dream. I've also had watches that died completely after three months, no trauma, no buildup on the contacts, just stopped charging.

The MorePro lasted me a full week of daily wear before I needed to charge it, and that included three GPS runs. The Garmin lasted 6 days with similar use. The Apple Watch needs charging every day and a half, which is the main reason I don't recommend it for runners who don't want to think about battery.

My ritual now: I plug it in when I shower every morning. 15, 20 minutes tops. It never drops below 70%. I've been doing this for months and it's become this weird ritual. But a watch that can't survive that, it's a paperweight.

Here's the pattern I keep seeing across every cheap watch I've owned or researched: the battery degrades after about three months of daily charging. My first watch died at exactly three months. The one I bought as a gift died at four. The MorePro is at three weeks, so I can't tell you if it'll survive the long haul, but I'll update this when I know.

Should You Buy It?

If you're a runner who wants to track your pace, distance, and heart rate without spending ~$200, the MorePro is the answer. It's not perfect, the app is annoying, and the step counter might stop working for a day, but for ~$25, you get what you get, and what you get here is pretty good.

If you're training for a marathon and you want recovery metrics and accurate GPS, save up for the Garmin. The Forerunner 55 is worth the money, and I say that as someone who's worn a ~$25 watch for the past two years. But if you're just starting out, or you're a casual runner who wants to see your splits, the cheap watch will do the job.

I'm testing two more budget watches this month, and I'll update this review when I have the data. One of them is already giving me nightmares to attach to my phone, but that's a story for another day.